20556225127 has 2 divisors, whose sum is σ = 20556225128. Its totient is φ = 20556225126.

The previous prime is 20556225101. The next prime is 20556225133. The reversal of 20556225127 is 72152265502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20556225127 is a prime.

It is a super-2 number, since 2×20556225127² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20556225167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10278112563 + 10278112564.

It is an arithmetic number, because the mean of its divisors is an integer number (10278112564).

Almost surely, 2^20556225127 is an apocalyptic number.

20556225127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20556225127 is an equidigital number, since it uses as much as digits as its factorization.

20556225127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 20556225127 in words is "twenty billion, five hundred fifty-six million, two hundred twenty-five thousand, one hundred twenty-seven".